Se digitando il seguente comando powershell di esempio:

Invoke-WebRequest -Uri https://your.url.raw.githubusercontent.com/blablabla.../

Avete l’errore:

Invoke-WebRequest : The request was aborted: Could not create SSL/TLS secure channel.

Prima del comando, digitate:

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12